Panasonic KX-TD816NZ - Manual (Page 90)

2.7 Setting the Telephone According to Your Needs
90
Operation
2.7.5 Denying Other People the Possibility of Picking up Your
Calls (Call Pickup Deny)
Off-hook. On-hook.
2 0 7
Dial 720. Dial 1 to deny
or 0 to allow.
Deny
Allow
1
0
OR
PT / SLT
C.Tone